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Minimum allowable values of energy efficiency and energy efficiency grades for blowers
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Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower
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Standard similar to GB 28381-2026
GB 28380 | GB 28736 | GB 28381 | Basic data
| Standard ID | GB 28381-2026 (GB28381-2026) |
| Description (Translated English) | Minimum allowable values of energy efficiency and energy efficiency grades for blowers |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | F01 |
| Classification of International Standard | 27.010 |
| Date of Issue | 2026-03-31 |
| Date of Implementation | 2027-04-01 |
| Older Standard (superseded by this standard) | GB 28381-2012 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB 28381-2012: Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Minimum allowable values of energy efficiency and evaluating values of energy conservation for centrifugal blower
ICS 27.010
F01
National Standards of People's Republic of China
Centrifugal blower energy efficiency limit value and energy evaluation
Published 2012-05-11
2012-09-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Foreword
5.3 This standard is mandatory, the rest are recommended.
This standard was drafted in accordance with rules GB/T 1.1-2009 given.
This standard was proposed by the National Development and Reform Resource Conservation and Environmental Protection Committee.
This standard by the National Energy Foundation and Management Standardization Technical Committee (SAC/TC20).
This standard was drafted. Shenyang Blower Works (Group) Co., Ltd., China National Institute of Standardization, Shaanxi Blower (Group) Co., heavy
Qing General Industry (Group) Co., Ltd., Nantong big Tongbao Fu Fan Co., Zhangqiu Blower Co., Ltd., Zhejiang
Upper hand Industry Corp., Ltd. Jiangsu Golden psychic fan.
The main drafters. Chen Fengyi, Mei Yuanping, Zhao Yuejin, Zheng Hua, Li Po thick, Liao Yulong, Li Junhua, Xu Baohua, Zhu Mengbo, Cao Ping.
Centrifugal blower energy efficiency limit value and energy evaluation
1 Scope
This standard specifies the centrifugal fan energy efficiency limit, evaluating values of energy and test methods.
This standard applies to single-stage double support low-speed centrifugal blower, low-speed multistage centrifugal blower, a high-speed single-stage centrifugal blower double support (for
Comprising double sided Ye Lun intake air), a high-speed multi-stage centrifugal blower.
2 Normative references
The following documents for the application of this document is essential. For dated references, only applies to the version dated paper
Pieces. For undated references, the latest edition (including any amendments) applies to this document.
JB/T 2977 Industrial fans, blowers and the compressor turbine terminology
JB/T 3165 and thermal performance test axial centrifugal blowers and compressors
JB/T 7258 general purpose centrifugal blower
3 Terms and Definitions
JB/T 3165, JB/T 2977 and define the following terms and definitions apply to this document.
3.1
Centrifugal blower energy efficiency limit minimumalowablevaluesofenergyefficiencyforcentrifugalblower
Under predetermined standard test conditions, the centrifugal fan allowable minimum guaranteed value of the polytropic efficiency.
3.2
Centrifugal blower energy evaluation values evaluatingvaluesofenergyconservationforcentrifugalblower
In the standard test conditions specified, polytropic efficiency centrifugal blower energy should reach the minimum guaranteed value.
4 Products
Centrifugal fan according to the number series, the structure can be divided into single-stage and turn the boom low-speed, single-stage double support low-speed, multi-level low-speed, single-stage high cantilever
Speed, single-stage and multi-stage high-speed double support high-speed centrifugal blower.
5 Technical requirements
5.1 Basic requirements
Centrifugal blower product design, manufacturing and quality shall comply JB/T 7258's.
5.2 polytropic efficiency of the centrifugal fan is calculated
ηpol =
Wpol
Wtot ×
100% = m
/ (M-1)
k/(k-1) × 100% =
k/(k-1) ×
lg (P2/P1)
lg (T2/T 1) ×
100% (1)
Where.
ηpol --- Blower changing efficiency;
Wpol --- blower variable compression work, kilojoules per kilowatt unit (kJ/kW);
The total power consumption of the blower --- Wtot, expressed in kilojoules per kilowatt (kJ/kW);
--- medium polytropic exponent m;
K --- adiabatic index medium;
--- blower outlet pressure P2, in megapascals (MPa);
Pl --- blower inlet pressure, in megapascals (MPa);
T2 --- blower outlet temperature, in Kelvin (K);
Tl --- blower inlet temperature, Kelvin (K).
5.3 centrifugal fan energy efficiency limit
5.3.1 centrifugal blower, the highest range ηpol polytropic efficiency as energy efficiency limit.
5.3.2 centrifugal fan energy efficiency limit ηpol not lower than specified in Table 1 to Table 4. The use of a three-dimensional flow impeller rotor, which
Tables 1 to 4 in energy efficiency limit ηpol should be increased by 5%; multi-stage rotor wheel, which can be ηpol efficiency limit value averaging levels;
For double cantilever support low-speed single-stage centrifugal blower or a single-stage double cantilever support high-speed centrifugal fan energy efficiency limit should ηpol
Table 1, a 1% increase in the values in Table 3.
Table 1 double support low-speed single-stage centrifugal blower energy efficiency limit (including double-sided Ye Lun intake air)
b2/D2
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020 51.0 52.5 53.5 55.0 54.0
0.021 0.030 65.0 68.0 68.5 70.0 70.5
0.031 to 0.040 67.0 69.5 70.0 71.0 72.0
0.041 to 0.050 69.5 70.5 71.0 72.0 73.0
0.051 0.060 70.0 71.5 72.0 73.0 74.0
0.061 to 0.080 68.5 71.0 71.5 72.5 73.5
0.081 ~ 0.090 67.5 70.0 70.5 71.5 72.5
> 0.091 66.5 69.0 69.5 70.5 71.5
NOTE. b2 --- blower Ye Lun outlet width; outlet diameter D2 of the fan wheel ---.
Table 2 multistage centrifugal blower low energy efficiency limit
b2/D2
series
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020
2 50.5 52.0 3 53.0 54.5 ~ 53.5
49.5 51.5 4-6 52.5 54.0 53.0
0.021 to 0.030
2 64.5 67.5 3 68.0 69.5 ~ 70.0
64.0 67.0 4-6 67.5 69.0 69.5
TABLE 2 (cont.)
b2/D2
series
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
0.031 to 0.040
2 66.5 69.0 3 69.5 70.5 ~ 71.5
66.0 68.5 4-6 69.0 70.0 71.0
0.041 to 0.050
2 69.0 70.0 3 70.5 71.5 ~ 72.5
67.5 68.5 4-6 69.0 70.0 71.0
0.051 ~ 0.060
2 69.5 71.0 3 71.5 72.5 ~ 73.5
70.0 70.5 4-6 71.0 72.0 73.0
0.061 ~ 0.080
2 68.0 70.5 3 71.0 72.0 ~ 73.0
67.5 70.0 4-6 70.5 71.5 72.5
0.081 ~ 0.090
2 67.0 69.5 3 70.0 71.0 ~ 72.0
66.5 69.0 4-6 69.5 70.5 71.5
> 0.091
2 66.0 68.5 3 69.0 70.0 ~ 71.0
65.5 68.0 4-6 68.5 69.5 70.5
NOTE. b2 --- blower Ye Lun outlet width; diameter D2 of the outlet of the blower wheel ---; --- the Z series blower Ye Lun.
Table 3 double support high-speed single-stage centrifugal blower energy efficiency limit (including double-sided Ye Lun intake air)
b2/D2
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020 51.5 53.0 54.0 55.5 54.5
0.021 0.030 65.5 68.0 69.0 70.5 71.0
0.031 to 0.040 67.5 70.0 70.5 71.5 72.5
0.041 to 0.050 70.0 71.0 71.5 72.5 73.5
0.051 0.060 70.5 72.0 72.5 73.5 74.5
0.061 to 0.080 69.0 71.5 72.0 73.0 74.0
0.081 ~ 0.090 68.0 70.5 71.0 72.0 73.0
> 0.091 67.0 69.5 70.0 71.0 72.0
NOTE. b2 --- blower Ye Lun outlet width; outlet diameter D2 of the fan wheel ---.
Table 4 Multi-stage high-speed centrifugal blower energy efficiency limit
b2/D2
series
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020
2 51.0 52.5 53.5 55.0 54.0
3 50.0 52.0 4 53.0 54.5 ~ 53.5
0.021 to 0.030
2 65.0 68.5 69.0 70.0 71.0
3 64.5 67.5 4 68.5 69.5 ~ 70.5
0.031 to 0.040
2 67.0 69.5 70.0 71.0 72.0
3 66.5 69.0 4 69.5 70.5 ~ 71.5
0.041 to 0.050
2 69.5 70.5 71.0 72.0 73.0
3 69.0 70.0 4 70.5 71.5 ~ 72.5
0.051 ~ 0.060
2 70.0 71.5 72.0 73.0 74.0
3 69.5 71.0 4 71.5 72.5 ~ 73.5
0.061 ~ 0.080
2 68.5 71.0 71.5 72.5 73.5
3 68.0 70.5 4 71.0 72.0 ~ 73.0
0.081 ~ 0.090
2 67.5 70.0 70.5 71.5 73.0
3 67.0 69.5 4 70.0 71.0 ~ 72.0
> 0.091
2 66.5 69.0 69.5 70.5 71.5
3 68.0 68.5 4 69.0 70.0 ~ 71.0
NOTE. b2 --- blower Ye Lun outlet width; diameter D2 of the outlet of the blower wheel ---; --- the Z series blower Ye Lun.
5.4 Evaluation centrifugal fan energy value
5.4.1 maximum polytropic efficiency of use of the centrifugal fan as an energy saving ηpol evaluation value.
5.4.2 centrifugal fan energy evaluation value should be greater than specified in Table 5 to Table 8. If the three-dimensional flow impeller rotor employed, its table 5 -
Evaluating values of energy ηpol Table 8 should be increased by 5%; multi-stage impeller to the rotor, which energy should ηpol evaluation values averaged levels; for
Cantilever double support low-speed single-stage centrifugal blower or a single-stage double cantilever support high-speed centrifugal fan energy evaluation values should ηpol Tables 5
7 increases the value of 1%.
TABLE 5 Single-stage double support the blower speed centrifugation evaluating values of energy (including double-sided Ye Lun intake air)
b2/D2
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020 55.0 56.5 57.5 59.0 58.0
0.021 0.030 69.0 72.0 72.5 74.0 74.5
0.031 to 0.040 71.0 73.5 74.0 75.0 76.0
Table 5 (Continued)
b2/D2
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
0.041 to 0.050 73.5 74.5 75.0 76.0 77.0
0.051 0.060 74.0 75.5 76.0 77.0 78.0
0.061 to 0.080 72.5 75.0 75.5 76.5 77.5
0.081 ~ 0.090 71.5 74.0 74.5 75.5 76.5
> 0.091 70.5 73.0 73.5 74.5 75.5
NOTE. b2 --- blower Ye Lun outlet width; outlet diameter D2 of the fan wheel ---.
Table 6 multistage blower speed centrifugation energy evaluation values
b2/D2
series
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020
2 54.5 56.0 3 57.0 58.5 ~ 57.5
54.0 55.5 4-6 56.5 58.0 57.0
0.021 to 0.030
2 68.5 71.5 3 72.0 73.5 ~ 74.0
68.0 71.0 4-6 71.5 73.0 73.5
0.031 to 0.040
2 70.5 73.0 3 73.5 74.5 ~ 75.5
70.0 72.5 4-6 73.0 74.0 75.0
0.041 to 0.050
2 73.0 74.0 3 74.5 75.5 ~ 76.5
72.5 73.5 4-6 74.0 75.0 76.0
0.051 ~ 0.060
2 73.5 75.0 3 75.5 76.5 ~ 77.5
73.0 74.5 4-6 75.0 76.0 77.0
0.061 ~ 0.080
2 72.0 74.5 3 75.0 76.0 ~ 77.0
71.5 74.0 4-6 74.5 75.5 76.5
0.081 ~ 0.090
2 71.0 73.5 3 74.0 75.0 ~ 76.0
70.5 73.0 4-6 73.5 74.5 75.5
> 0.091
2 70.0 72.5 3 73.0 74.0 ~ 75.0
69.5 72.0 4-6 72.5 73.5 74.5
NOTE. b2 --- blower Ye Lun outlet width; diameter D2 of the outlet of the blower wheel ---; --- the Z series blower Ye Lun.
Table 7 Single-stage double support high-speed centrifugal blower energy evaluation values (including double-sided Ye Lun intake air)
b2/D2
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020 55.5 57.0 58.0 59.5 58.5
0.021 0.030 69.5 72.5 73.5 74.5 75.0
0.031 to 0.040 71.5 74.0 74.5 75.5 76.5
0.041 to 0.050 74.0 75.0 75.5 76.5 77.5
0.051 0.060 74.5 76.0 76.5 77.5 78.5
0.061 to 0.080 73.0 75.5 76.0 77.0 78.0
0.081 ~ 0.090 72.0 74.5 75.0 76.0 77.0
> 0.091 71.0 73.5 74.0 75.0 76.0
NOTE. b2 --- blower Ye Lun outlet width; outlet diameter D2 of the fan wheel ---.
Table 8 multistage high-speed centrifugal blower energy evaluation values
b2/D2
series
The use of maximum polytropic efficiency blower ηpol /%
Ye Lun diameter D2/mm
< 300 301 ~ 400 401 ~ 600 601 ~ 800> 801
< 0.020
56.5 57.5 59.0 58.0 2 55.0
3 54.0 56.0 4 57.0 58.5 ~ 57.5
0.021 to 0.030
2 69.0 72.0 72.5 74.0 74.5
3 68.5 71.5 4 72.0 73.5 ~ 74.0
0.031 to 0.040
2 71.0 73.5 74.0 75.0 76.0
3 70.5 73.0 4 73.5 74.5 ~ 75.5
0.041 to 0.050
2 73.5 74.5 75.0 76.0 77.0
3 73.0 74.0 4 74.5 75.5 ~ 76.5
0.051 ~ 0.060
2 74.0 75.5 76.0 77.0 78.0
3 73.5 75.0 4 75.5 76.5 ~ 77.5
0.061 ~ 0.080
2 72.5 75.0 75.5 76.5 77.5
3 72.0 74.5 4 75.0 76.0 ~ 77.0
0.081 ~ 0.090
2 71.5 74.0 74.5 75.5 76.5
3 71.0 73.5 4 74.0 75.0 ~ 76.0
> 0.091
2 70.5 73.0 73.5 74.5 75.5
3 70.0 72.5 4 73.0 74.0 ~ 75.0
NOTE. b2 --- blower Ye Lun outlet width; diameter D2 of the outlet of the blower wheel ---; --- the Z series blower Ye Lun.
